Selected Java Interview Questions
Jan 19, 2025 · Databases
Understanding MySQL Covering Indexes, Table Lookups, and the Leftmost Prefix Rule
This article explains MySQL covering indexes, how table lookups (back‑table operations) work, and the leftmost prefix rule for composite indexes, providing practical examples and tips for optimizing query performance in interview scenarios.
Back TableCovering IndexDatabase Optimization
0 likes · 8 min read